Arrays - Find missing numbers in a Sequence

Question

I\'m trying to find an easy way to loop (iterate) over an array to find all the missing numbers in a sequence, the array will look a bit like the one below.

var nu

Answer 1

Try as shown below

// Find the missing number
let numArray = [0189459, 0189460, 0189461, 0189463, 0189468];
let numLen = numArray.length;
let actLen = Number(numArray[numLen-1])-Number(numArray[0]);
let  allNumber = [];

for(let i=0; i<=actLen; i++){
  allNumber.push(Number(numArray[0])+i);
}
[...allNumber].forEach(ele=>{
  if(!numArray.includes(ele)){
    console.log('Missing Number -> '+ele);
  }
})